Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Garage Door opener will not opern

I have a craftsman 1/2 hp chain driven garage door opener(model # 139.53973SRT). The original problem was I would press the wall mounted switch and the motor would operate but the garage door would open. I replaced the gear and sprocket assembly. Now when I press the wall mounted switch the motor will not operate. The SRT button on back of the motor flashes 2x's. How do I correct this problem?

Mark Chastain
mchastain@abmi.net

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2 flashes indicate safety eye issue. Check you wiring and make sure it is wired correctly and check to make sure the eyes are properly aligned.

Posted on Jan 29, 2009

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